# DNS CNAME Lookup for blog Subdomain via Cloudflare DoH

> DNS CNAME Lookup for blog Subdomain via Cloudflare DoH is a paid API for AI agents from dns.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-21).

Looks up the CNAME DNS record for the blog.<domain> subdomain using Cloudflare DNS-over-HTTPS and returns its existence status, records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/blog/cname?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dns-cname-lookup-for-blog-subdomain-via-cloudflare-doh-0f62ac9e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cNlaxuPKBG_p5uXekkVVQ

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability dns-cname-lookup-for-blog-subdomain-via-cloudflare-doh-0f62ac9e
```

Example prompt: Can you check whether blog.rallylive.ca has a CNAME record set up, and tell me what it points to and its TTL?

## When to prefer this

Use this endpoint when you need a fast, targeted check of whether a specific domain has a blog subdomain CNAME record, without running a full subdomain enumeration. Prefer this over general DNS resolvers when you want Cloudflare DoH as the resolver and need a simple existence check with TTL. Ideal for pre-launch validation, infrastructure auditing, or monitoring a single well-known subdomain.

## Known failure modes

- Domain does not exist — returns no records found
- blog subdomain has no CNAME record configured — returns empty or NXDOMAIN response
- Invalid domain format supplied — may return error or empty result
- Cloudflare DoH temporarily unavailable — lookup may fail or timeout
- Domain has blog subdomain but as A/AAAA record, not CNAME — returns no CNAME records

## How this service works

CNAME record of blog.<domain>: looks up the blog host under the domain you give (CNAME via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like blog without enumerating subdomains. $0.01 per lookup.

## Output

Returns whether the blog.<domain> CNAME record exists, the actual CNAME record value(s) it holds, and the TTL (time-to-live) of the record as answered by Cloudflare DNS-over-HTTPS.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/dns-cname-lookup-for-blog-subdomain-via-cloudflare-doh-0f62ac9e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from dns.intel.rallylive.ca](https://www.zero.xyz/host/dns.intel.rallylive.ca/llms.txt)